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| Decision field | Open accessControlled Tech Pack OrientationGlobalRemove | Free downloadSeamly2DGlobalRemove |
|---|---|---|
| Decision fit | ||
| Primary job | Source production | Find patterns & fit |
| Area | Production | Patterns & fit |
| Best for | Understanding what a tech pack must control before using a template or releasing work | Digital pattern drafting |
| Know before using | An orientation rather than a completed product record; it does not supply a universal format, licensed standard content, measurements, tolerances, construction settings, labels, approvals, compliance conclusion, or product-release authority. | Patternmaking knowledge, controlled measurement files, production conventions, and sewn fit testing are still required. The software does not validate body measurements, ease, balance, grading rules, fabric behavior, construction, or product fit. The project currently labels its user wiki manual as needing updates, so confirm current commands and file behavior against the installed release and active support channels. |
| Practical access | ||
| For | Apparel brands | Both |
| Location or jurisdiction | Global | Global |
| Access | Open access | Free download |
| Format | Stitch Authority | Software |
| Source type | Stitch Authority | Open-source project |
| Source and review | ||
| What the source establishes | The guide cites current ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it explicitly separates those authorities from product-specific technical and market decisions. | The maintained Seamly2D repository identifies the application as GPLv3+ open-source patternmaking software for Windows, macOS, and Linux. It reads multi-size measurement files for standardized sizes and individual measurement files for custom-fit work, publishes downloadable builds and releases, and links an active website and user forum. |
| Linked page reviewed | Jul 16, 2026 | Jul 21, 2026 |
| Next review due | Jul 16, 2027 | Jan 17, 2027 |
| Inspect | ||
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